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    Öğe
    Bukkal ve palatinal yüzeylerdeki eksternal servikal rezorpsiyon kavitelerinde kullanılan restorasyon materyallerinin dişin kırılma direncine etkisi
    (Çanakkale Onsekiz Mart Üniversitesi, 2025) Elpe, Saadet; Sarıyılmaz, Öznur
    Amaç: Bu çalışmanın amacı, üst keser dişlerin bukkal ve palatinal yüzeylerinde oluşturulan eksternal servikal rezorpsiyon (ESR) kavitelerinin, farklı restoratif materyallerle restore edilmesi durumunda dişlerin kırılma direnci üzerindeki etkisini ex vivo koşullarda değerlendirmektir. Yöntem: Toplam 81 adet çekilmiş maksiller santral diş kullanıldı. Dokuz diş, işlem uygulanmaksızın pozitif kontrol grubuna ayrıldı. Kalan 72 diş, bukkal ve palatinal olarak iki ana gruba (n=36) ayrıldı. Her ana grup, uygulanan restoratif materyale göre dört alt gruba ayrıldı: Negatif kontrol, Biodentin grubu, Ribbond grubu (Ribbond + Biodentin), EverX grubu (EverX Flow + Biodentin); n=9. Pozitif grup hariç tüm örneklere ESR kaviteleri pulpa dokusuna ulaşacak şekilde oluşturuldu ve standart kanal tedavisi uygulandı. Kanallar, ESR kavitesine kadar biyoseramik esaslı kanal patı ve gutta perka ile dolduruldu. ESR kaviteleri ilgili materyallerle restore edildi. Giriş kaviteleri kompozit ile restore edildi. Örnekler, çok fonksiyonlu çiğneme simülatöründe termal ve mekanik yaşlandırmaya tabi tutuldu. Kırılma testi, universal test cihazı ile 45° açıyla uygulanarak Newton (N) cinsinden maksimum kuvvet kaydedildi. Normallik varsayımının karşılandığı durumlarda bağımsız iki grubun karşılaştırılmasında Bağımsız Örneklem T testi, varsayımın karşılanmadığı durumlarda ise Mann Whitney U testi uygulandı. Normal dağılıma sahip olmayan bağımsız üç ve daha fazla grubun karşılaştırılması için Kruskal Wallis testi kullanıldı (p<0,05). Bulgular: Kırılma dirençleri, restoratif materyale göre anlamlı farklılık gösterdi (p<0,05). Bukkal bölgede Ribbond grubu , palatinal bölgede Biodentin grubu, negatif kontrole göre anlamlı şekilde daha yüksek kırılma direnci sağladı (p=0,005 ve p=0,044). Kavite konumuna göre gruplar arasında anlamlı fark tespit edilmedi (p>0,05). Sonuç: Restoratif materyal türü, ESR bulunan dişlerin kırılma direncini önemli ölçüde etkilemektedir. Ancak kavite konumunun (bukkal/palatinal) kırılma direnci üzerinde anlamlı bir etkisi bulunmamıştır.
  • Küçük Resim
    Öğe
    Can activation of root canal sealer enhance the penetration into lateral canals?
    (Turkish Endodontic Society, 2024) Sarıyılmaz, Öznur; Sarıyılmaz, Evren; Elpe, Saadet
    Purpose: This study aimed to compare the efficacy of a resin-based canal sealer and a bioceramic canal sealer in obturating lateral canals, with and without the use of activation methods. Methods: Lateral canals were created at apical positions of 3, 5, and 8 mm in eighty 3D-printed maxillary central teeth. After root canal preparation, the teeth were embedded in 1.5% agar agar to simulate periodontal tissues. The teeth were divided into two main groups based on the type of root canal sealer and further categorized into four subgroups for activation methods: Conventional, EDDY, EndoActivator, and Passive Ultrasonic. Root canals were filled using the single cone technique, and images were captured at 17× magnification. Sealer penetration into lateral canals was measured using ImageJ software. Activation methods were compared using the Kruskal-Wallis test; root levels were compared using the Friedman test, and comparisons between sealers were made with the Mann-Whitney U test at a 95% confidence level. Results: Activation methods had no significant impact on sealer penetration for both types of sealers. In ultrasonic activation groups, the bioceramic sealer exhibited significantly higher penetration than the resin-based sealer at all root levels. In sonic activation groups, the bioceramic sealer showed significantly superior penetration, especially at the middle root level. Conclusion: Activation methods did not significantly alter sealer penetration into lateral canals. Bioceramic-based root canal sealer demonstrated enhanced penetration compared to resin-based sealer, especially with ultrasonic and sonic activation.
  • [ X ]
    Öğe
    Effect of Restoration Strategy and Cavity Location on the Fracture Resistance of Teeth with External Cervical Resorption
    (Elsevier Inc., 2025) Elpe, Saadet; Sariyilmaz, Öznur
    Introduction The restoration of external cervical resorption (ECR) defects requires materials capable of withstanding functional stresses. This study aimed to compare the fracture resistance of different restorative approaches applied to buccal versus palatal ECR defects under simulated clinical conditions. Methods Eighty-one extracted human maxillary central incisors were used. Nine intact teeth served as the positive control group (n = 9). The remaining 72 teeth were randomly assigned to standardized buccal or palatal ECR defect groups (n = 36 each). Each subgroup (n = 9) received one of the following treatments: negative control (no restoration), Biodentine alone, Ribbond + Biodentine, or EverX Flow + Biodentine (n = 9 per subgroup). Standardized ECR cavities were created 4 mm apical to the cementoenamel junction, with dimensions of 3 mm in width and 3 mm in depth and connected to the pulp chamber. All specimens underwent chewing simulation (240,000 cycles, 50 N load) and thermocycling (5°C–55°C) prior to fracture testing. The fracture test was performed using a universal testing machine by applying force at a 45° angle, and the maximum load was recorded in Newtons (N). Statistical analysis was performed using parametric or nonparametric tests based on data distribution, with significance set at P < .05. Results The restorative material significantly influenced fracture resistance (P < .05). In buccal defects, the Ribbond + Biodentine group demonstrated significantly higher fracture resistance compared to negative controls. For palatal defects, Biodentine alone showed significantly greater resistance than negative controls. No significant differences were observed between buccal and palatal locations (P > .05). Conclusions While the choice of restorative material had a significant effect on the performance of restorations in ECR defects, the location of the cavity (buccal or palatal) did not significantly influence the outcomes. © 2025 American Association of Endodontists.